Callaway Great Big Bertha Epic Sub Zero Fairway WoodCallaway is once again challenging the accepted norm with innovative design logic that aims to stiffen the new GBB Epic clubs rather than enhance overall flexibility. This approach is a reaction to the discoveries made over the past two years, during which it was demonstrated that the face interacts differently at impact (with some favourable outcomes) than it had with previous, more flexible models. Emerging from the research and development project is a range that features a fortified frame immediately behind the face. Instead of letting the flexibility dissipate across the sole and crown, this method forces it to be concentrated at the club’s face.These new multi-material drivers have captured the attention of the pros, including Rory McIlroy. Callaway’s director of R&D for woods states, “Our new driver family represents a breakthrough in technology, innovation and performance… First and foremost, ‘Jailbreak' technology consists of two 3-gram titanium bars that connect the crown and sole near the face and fundamentally change the way the body and face behave at impact.” The company notes that a thinner and more flexible face, when combined with a rigid body, produces greater ball speed, energy transfer, and longer drives. Gibbs also mentioned that the structure stiffens the body, allowing for greater deflection of the face – greater face loading ultimately creates a larger area that emulates centre-hit performance by delivering superior ball speeds.Shared Design ComponentsTriaxial carbon crownExo-cage light and strong titanium bodyUpdated aerodynamic “Speed Step” crownNotable FeaturesFairway woods have no jailbreak constructionMany of the same technologies as the Epic woodsTwo interchangeable sole weightsAbility to adjust launch to preference, and spin by 250 rpmPositioning 22-gram weight close to face, and 3-gram weight toward the back generates lower launch and flatter ball flightUpdated face cup increases balls speeds on missesGBB Epic Sub Zero comes in 3+ (13.5°), 3 (15°), 5 (18°)Comes standard with the Aldila Rogue Max shaft.Buy Callaway Great Big Bertha (GBB) Epic Sub Zero Fairway Woods at Clickgolf.co.uk – the internet’s trusted name with exceptional prices, fast delivery, and unbeatable service